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Recognised as Colour

#170F58

  • #170F58
  • Blue
  • Dark
  • Nearest: Midnight blue

#170F58 is a blue with RGB values 23, 15, 88 and HSL 247°, 71%, 20%. It is a dark colour, so white text on it reaches 16.9:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#170F58#170F58
HEX#170F58
RGBrgb(23, 15, 88)
RGB (0–1)0.0902, 0.0588, 0.3451
RGB percentages9%, 5.9%, 34.5%
HSLhsl(246.6, 70.9%, 20.2%)
HSV / HSBhsv(246.6, 83%, 34.5%)
CMYK73.9%, 83%, 0%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,511,256
CSS custom property--colour: #170F58;

Brightness & contrast

Relative luminance0.01228WCAG 2.x, 0 is black and 1 is white
Perceived brightness34.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.86:1
Contrast with white16.86:1WCAG normal text: AAA
Contrast with black1.25:1WCAG normal text: Fail
Greyscale equivalent#161616
Inverted#E8F0A7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00205Ano red cones; affects about 1% of men; ΔE 14.5 from the original
Deuteranopia#001A57no green cones; the most common form, about 1% of men; ΔE 10.6 from the original
Tritanopia#002533no blue cones; rare, and affects men and women equally; ΔE 46.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.86:1WCAG large text: AAA
Contrast with black, large text1.25:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 9.5Dark slateblue · ΔE 20.3Rebecca purple · ΔE 26.6Indigo · ΔE 27.2Navy · ΔE 29.3Dark blue · ΔE 34.4
Nearest named CSS colourMidnight blue (#191970)ΔE 9.47, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#50580F
Analogous#0F2B58, #3C0F58
Triadic#58170F, #0F5817
Split complementary#583C0F, #2B580F
Tetradic#580F2B, #50580F, #0F583C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6152E1
Lighter +30%#3A26DA
Lighter +20%#2E1EAF
Lighter +10%#221684
Darker −10%#0C082C
Darker −20%#000001
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0D0265
Less saturated −25%#211C4B

Channel breakdown

R23
G15
B88
Red23 (9%)
Green15 (5.9%)
Blue88 (34.5%)
Hue246.58°
Saturation (HSL)70.87%
Lightness20.2%
Dominant channelBlue
Hex per channelR 17 · G 0F · B 58

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Every value on this page was computed from “170f58” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.